/**
 * Copyright (c) 2017, Dirk-Jan Rutten
 * All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */
import { GraphQLScalarType, Kind } from 'graphql';
import type { GraphQLScalarTypeConfig } from 'graphql';
import { createGraphQLError } from '../../error.js';
import { parseDateTime } from './formatter.js';
// eslint-disable-line
import { validateDateTime, validateJSDate } from './validator.js';

export const GraphQLDateTimeConfig: GraphQLScalarTypeConfig<Date, Date> = /*#__PURE__*/ {
  name: 'DateTime',
  description:
    'A date-time string at UTC, such as 2007-12-03T10:15:30Z, ' +
    'compliant with the `date-time` format outlined in section 5.6 of ' +
    'the RFC 3339 profile of the ISO 8601 standard for representation ' +
    'of dates and times using the Gregorian calendar.',
  serialize(value) {
    if (value instanceof Date) {
      if (validateJSDate(value)) {
        return value;
      }
      throw createGraphQLError('DateTime cannot represent an invalid Date instance');
    } else if (typeof value === 'string') {
      if (validateDateTime(value)) {
        return parseDateTime(value);
      }
      throw createGraphQLError(`DateTime cannot represent an invalid date-time-string ${value}.`);
    } else if (typeof value === 'number') {
      try {
        return new Date(value);
      } catch {
        throw createGraphQLError('DateTime cannot represent an invalid Unix timestamp ' + value);
      }
    } else {
      throw createGraphQLError(
        'DateTime cannot be serialized from a non string, ' +
          'non numeric or non Date type ' +
          JSON.stringify(value),
      );
    }
  },
  parseValue(value) {
    if (value instanceof Date) {
      if (validateJSDate(value)) {
        return value;
      }
      throw createGraphQLError('DateTime cannot represent an invalid Date instance');
    }
    if (typeof value === 'string') {
      if (validateDateTime(value)) {
        return parseDateTime(value);
      }
      throw createGraphQLError(`DateTime cannot represent an invalid date-time-string ${value}.`);
    }
    throw createGraphQLError(
      `DateTime cannot represent non string or Date type ${JSON.stringify(value)}`,
    );
  },
  parseLiteral(ast) {
    if (ast.kind !== Kind.STRING) {
      throw createGraphQLError(
        `DateTime cannot represent non string or Date type ${'value' in ast && ast.value}`,
        {
          nodes: ast,
        },
      );
    }
    const { value } = ast;
    if (validateDateTime(value)) {
      return parseDateTime(value);
    }
    throw createGraphQLError(
      `DateTime cannot represent an invalid date-time-string ${String(value)}.`,
      { nodes: ast },
    );
  },
  extensions: {
    codegenScalarType: 'Date | string',
    jsonSchema: {
      type: 'string',
      format: 'date-time',
    },
  },
};

/**
 * An RFC 3339 compliant date-time scalar.
 *
 * Input:
 *    This scalar takes an RFC 3339 date-time string as input and
 *    parses it to a javascript Date.
 *
 * Output:
 *    This scalar serializes javascript Dates,
 *    RFC 3339 date-time strings and unix timestamps
 *    to RFC 3339 UTC date-time strings.
 */
export const GraphQLDateTime = /*#__PURE__*/ new GraphQLScalarType(GraphQLDateTimeConfig);
